Abstract: A cutting system includes a dam, a cylinder, a hydraulic controlling module, and a PLC controlling module. The hydraulic controlling module includes a reversing valve connected to the cylinder. The PLC controlling module is connected to the reversing valve and adapted to output a control signal to locate the reversing valve in a first open position or a second open position. When the reversing valve is in the first open position, the reversing valve allows the high pressure oil to flow into the cylinder from the hydraulic controlling module, thereby to causing the piston module to push the dam to cut the gate mark; when the reversing valve is in the second open position, the high pressure oil flows back to the hydraulic controlling module.

Abstract: A method for manufacturing a product is provided. Inject a molten plastic in a cavity via a channel and a gate of a mold. Form a molten plastic product with a configuration of the cavity. Maintain a preset pressure in the cavity to maintain the configuration of the molten plastic product in the cavity. Slide a dam to into a position of the gate and remove the gate marks from the molten plastic products. Cool and harden the molten plastic product to form a solid product. Release the preset pressure. Move the dam away from the cavity. Eject the solid product out of the cavity.

Abstract: A plastic injection product manufacturing system includes a forming machine, a PLC module, an oil output module, an oil vat, and a cutter. The forming machine includes a mold cavity for forming a plastic injection product. The mold cavity defines a gate for receiving molten plastic material. The PLC module is connected to the forming machine. The oil output module is connected to the PLC module. The oil vat is connected to the oil output module. The oil vat includes a vat body and a piston slidably mounted in the vat body. The cutter is connected to the piston. The PLC module controls the oil output module to output hydraulic pressure oil, after receiving a control signal from the forming machine, to the vat body of the oil vat to drive the piston to move. The cutter is driven to move to cut off plastic material out of the gate.

Abstract: A pressure controlling system includes a pressurized device, a piston device, and an electromagnetic routing valve. The pressurized device includes a moving cavity, and a receiving cavity adapted to receive liquid. A pipe is connected to the receiving cavity, and the pipe is adapted to connect a hydraulic cylinder plate. A connecting pipe, a noise elimination pipe, a first gas transmitting pipe, and a second gas transmitting pipe are connected to the electromagnetic routing valve. The first gas transmitting pipe and the second gas transmitting pipe are connected to the pressurized device.